it sound like hes got a short....and if the tach is hooked up like the link is posted i then if he removed the tack wire then it would die
im thinking there is something wrong with the pertronixs. i think that when the tach is hooked up the resistance in the system reaches a level to where the pertronix can trigger the coil.
he has had 2-3 different modules burn up...2 different dists...and 3-4 coils to toast (1 stock ) I'm hung up on the...tach having to be hooked up... for the motor to run... this didn't always do this...just started a year ago...on the way to the Stampede...
He also has an aftermarket wire harness in the car. I would start off with the tach disconnected and start probing all wires in the ignition system. checking for shorts to ground and for correct voltage.
2 things come to mind, first, the stator wire goes to the " S " terminal on the voltage regulator. It also goes to the electric choke on some models. It must never be grounded! Second, it was mentioned about alternator replacement. Check your charging voltage. It must not go over 15V! Sorry I can't help on the Pertronix unit. I'm not at all familiar enough with it. I do know that over charging will fry coils and that if the stator lead gets grounded, goodbye alternator and regulator!
The alternator is a 3G, so the regulator is internal. Charging voltage is 14.3V, and 11.97V to the coil. I don't have an indicator light, as stated before, so I have to run down the stator wire and find out where it goes. The schematic is missing, so that really puts a monkey wrench into things. Sure wish it would turn up.
